Sequential mestranol-norethindrone for oral contraception.
D002986:Clinical Trials as Topic; D003276:Contraceptives, Oral; D004357:Drug Synergism; D005260:Female; D006801:Humans; D008656:Mestranol; D009640:Norethindrone
D003276:Contraceptives, Oral; D008656:Mestranol; D009640:Norethindrone